import java.util.*;

public class Minus {
	public static void main(String[] args) {
		int number1=(int)(Math.random() * 10);
		int number2=(int)(Math.random() * 10);

		if(number1<number2) {
			int tmp=number1;
			number1=number2;
			number2=tmp;
		}

		System.out.println("What is " + number1 + "-" + number2 + " ?");

		Scanner input=new Scanner(System.in);
		int answer=input.nextInt();

		if(number1-number2==answer) {
			System.out.println("Correct!");
		}
		else {
			System.out.println("Wong. " + number1 + "-" + number2 + "=" + (number1 - number2));
		}
	}
}
